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re PR middle-end/53790 (ICE on dereferencing a extern union in asm statement) 

2012-06-28  Richard Guenther  <rguenther@suse.de>

	PR middle-end/53790
	* expr.c (expand_expr_real_1): Verify if the type is complete
	before inspecting its size.

	* gcc.dg/torture/pr53790.c: New testcase.

From-SVN: r189045
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Richard Guenther 2012-06-28 11:45:14 +00:00 committed by Richard Biener
parent 7db2226d07
commit 4519d74588
4 changed files with 29 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2012-06-28 Richard Guenther <rguenther@suse.de>
PR middle-end/53790
* expr.c (expand_expr_real_1): Verify if the type is complete
before inspecting its size.
2012-06-28 Andreas Schwab <schwab@linux-m68k.org> 2012-06-28 Andreas Schwab <schwab@linux-m68k.org>
* doc/include/gpl.texi: Remove. * doc/include/gpl.texi: Remove.

1
gcc/expr.c
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@ -9832,6 +9832,7 @@ expand_expr_real_1 (tree exp, rtx target, enum machine_mode tmode,
orig_op0 = op0 orig_op0 = op0
= expand_expr (tem, = expand_expr (tem,
(TREE_CODE (TREE_TYPE (tem)) == UNION_TYPE (TREE_CODE (TREE_TYPE (tem)) == UNION_TYPE
&& COMPLETE_TYPE_P (TREE_TYPE (tem))
&& (TREE_CODE (TYPE_SIZE (TREE_TYPE (tem))) && (TREE_CODE (TYPE_SIZE (TREE_TYPE (tem)))
!= INTEGER_CST) != INTEGER_CST)
&& modifier != EXPAND_STACK_PARM && modifier != EXPAND_STACK_PARM

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2012-06-28 Richard Guenther <rguenther@suse.de>
PR middle-end/53790
* gcc.dg/torture/pr53790.c: New testcase.
2012-06-28 Jakub Jelinek <jakub@redhat.com> 2012-06-28 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/53645 PR tree-optimization/53645

17
gcc/testsuite/gcc.dg/torture/pr53790.c Normal file
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@ -0,0 +1,17 @@
/* { dg-do compile } */
typedef struct s {
int value;
} s_t;
static inline int
read(s_t const *var)
{
return var->value;
}
int main()
{
extern union u extern_var;
return read((s_t *)&extern_var);
}